House Brick-Concrete Prefabricated Slab Structure Diagram
Currently, a specific diagram of the house brick-concrete prefabricated slab structure cannot be directly provided, but its structural characteristics and construction key points can be introduced in detail.
Structural Composition and Material Characteristics
The brick-concrete prefabricated slab structure uses brick walls as the main load-bearing components, with prefabricated hollow slabs for the floor. These prefabricated hollow slabs are typically made of concrete and steel bars, featuring regularly arranged holes inside. This design makes them lightweight, saving approximately 40% of concrete and 50% of steel compared to cast-in-place slabs. Additionally, the hollow structure effectively enhances sound insulation performance, reducing the impact of floor sound transmission on living comfort.
Connection Method and Overall Performance
The overall integrity of this structure is relatively poor, mainly due to its assembled construction. The prefabricated slabs are joined to form the floor through slab joints, which are usually filled with fine aggregate concrete or cement mortar. This connection method results in weak collaborative working capacity between slabs, making them prone to cracking or displacement at the joints under horizontal loads (such as earthquake forces). Furthermore, the connection between the prefabricated slabs and brick walls often relies on embedded parts or locally cast-in-place nodes, further limiting the structure's seismic performance.
Construction Process and Key Steps
Construction should follow the sequence of "main structure first, then floor":
- Foundation and Wall Construction: After completing foundation treatment, brick walls are constructed as vertical load-bearing structures. The walls need to be provided with structural columns and ring beams according to design requirements to enhance overall integrity.
- Prefabricated Slab Installation: Once the walls reach a certain strength, the prefabricated hollow slabs are hoisted to the designated positions, fixed with mortar or embedded parts, and the slab joints are aligned.
- Slab Joint Treatment: The slab joints are filled with fine aggregate concrete or cement mortar, which should be vibrated and compacted in layers to avoid voids. Reinforcing bars can be added if necessary.
- Surface Layer Construction: A leveling layer, waterproof layer (such as in bathrooms), and surface layer materials (such as floor tiles or wooden floors) are laid on the prefabricated slabs.
Applicable Scenarios and Limitations
The brick-concrete prefabricated slab structure, due to its low cost and fast construction, was once widely used in low-rise residential buildings (such as those under 6 stories) and rural self-built houses. However, its drawbacks of poor seismic performance and limited space renovation have become increasingly prominent, and it is gradually being replaced by cast-in-place concrete structures or prefabricated concrete structures in modern construction. To enhance its seismic capacity, structural columns and ring beams can be added, or post-tensioned prestressed technology can be used to strengthen the slab joint connections.
